Seiko Cal. 4578 - 846

Seiko 4578-846

The Seiko 4578-846 represents an important milestone in Seiko's 1971 lineup. Powered by the 4578 caliber with 21j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-aa884138edbc]

Also known as: Sumo, Sportsmatic

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
34mm
Case Thickness
15.1mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
190m
Dial Color
White
Jewels
21j
Frequency
21,600 bph
Power Reserve
58 hours
Year
1971

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